Abstinence before marriage should be seen as cool as banging random chicks from the club or off Tinder
It is a bell curve, most people's relationship lives are not to going to resemble either the person who especially gets around or the abstinent person, instead of falling in the middle of a series but not massive amount of sexual relationships.
However just as we should respect the right of the people into having tons of hook-ups to go ahead and get it on, we should also consider that there's a lot of people out there and some people's personality is meant for the complete other extreme. This should also be promoted as also viable and cool if you want to go that way. There are some people where the current system is not working, making them unhappy, etc., maybe a more reserved courting process would click more for them romantically. Or maybe that bf/gf they had at 25 they would've got married to if abstinence pushed them over the edge, and it would've been for their own good. It's acknowledging people are different and there should be options for them.
Is this already the case? In religious areas yes. I don't think for non religious people it's really close which is more popular between casual sex and abstinence or versions of it.